Best Air & Fuel Ratio Gauges of 2026

The AEM X-Series Wideband UEGO Gauge (PN 30-0300) features a large seven-segment center display, which is 87% larger than the previous version. It comes with 0-5v and RS232 Serial Port outputs for feedback control and data logging, and an AEMnet (CANbus) output for data logging. With X-Digital wideband technology, it can read and report values that other controllers cannot, providing optimized engine tuning and safer operation. The gauge's faster response time improves wideband feedback control for a more powerful and accurate tune. Dead time affects the data you see when tuning an engine using wideband AFR feedback control on an inertia dyno.

The Gledewen Air Fuel Gauge features a vibrant 24-color LED display and a central readout that makes it easy for you to monitor your vehicle's air-fuel ratio, lambda, and oxygen percentage. With its advanced technology, this gauge provides real-time feedback on your engine's performance, helping you optimize power while ensuring safety. You can choose between two calibration modes, making it user-friendly for both novices and experts. Plus, its wide compatibility with various vehicle systems allows you to gather valuable data effortlessly.

The AEM Wideband UEGO Gauge is the ultimate tool for monitoring your vehicle's air-fuel ratio. With its OBDII connectivity, this gauge allows you to easily read and analyze your vehicle's AFR readings through the Factory ECU can-bus. This feature is particularly useful for users with piggyback programmers or open source tuning software, as it provides real-time data for precise tuning. The AEM Wideband UEGO Gauge is also known for its fast response time, ensuring accurate readings even during rapid changes in AFR. With its international compatibility, this gauge is suitable for users worldwide. Upgrade your vehicle's tuning capabilities with the AEM Wideband UEGO Gauge.

The GlowShift Black 7 Color Series Digital Wideband Air/Fuel Ratio Gauge is a must-have tool for measuring the air to fuel ratios of gasoline or E85 flex-fuel performance vehicles. With gasoline wideband air/fuel ratio readings from 10.00 to 20.00 AFR and E85 wideband air/fuel ratio readings from 6.00 to 12.00 AFR, this 2-1/16" (52mm) gauge features a black dial, clear lens, and 7-color digital display. The gauge also includes 4.9 LSU wideband oxygen sensor, weld-in bung, control box, and other necessary hardware for installation. The 7 solid color modes & 2 color cycle modes are great for customizing the gauge to match factory dashboard lights or adding a personalized touch to the vehicle's interior.

The Denso Air Fuel Ratio Sensor is a highly accurate and efficient fuel consumption gauge that is easy to install. Constructed from durable material, this sensor provides reliable and precise readings to help you optimize your vehicle's fuel efficiency. With its high accuracy, you can trust that the readings are reliable and make informed decisions about your fuel consumption. The easy installation process ensures that you can start using this sensor quickly and hassle-free. Made from durable material, it is built to last and withstand the rigors of everyday use. Upgrade your vehicle's fuel monitoring system with the Denso Air Fuel Ratio Sensor for improved fuel efficiency and performance.

The Motoforti Battery Sensor is designed to fit a variety of vehicles, including Jeep Grand Cherokee models from 2017 to 2020, as well as several Dodge and Ram models. This sensor replaces your faulty battery current sensor, helping restore your vehicle’s performance and preventing electrical issues. Made from durable plastic metal, it’s built to withstand everyday wear and tear, ensuring long-lasting reliability. Installation is straightforward—you can either replace the sensor yourself or seek professional help if preferred, making it a convenient upgrade for your car’s electrical system.

The AEM 52mm Wideband UEGO Air Fuel Ratio Sensor Controller Gauge is the fastest responding wideband air/fuel ratio controller among its competitors. Its display shows Lambda values from .55 to 2.00, and it includes a Bosch 4.9LSU wideband UEGO sensor. The calibrated resistor does not require free-air calibration, but technology allows for it as the sensor ages. The gauge kit comes with a white bezel kit, black bezel, and black dual-faced faceplate or silver bezel/white gauge option. The 52mm gauge diameter and slim 0.825” gauge depth make it easy to fit in most cars.

The GlowShift AFR Gauge is a vital tool for optimizing the air-to-fuel ratios in your gasoline or E85 FlexFuel vehicle. It provides wideband readings, helping you monitor performance with accuracy. With a sleek 2-1/16" design and a tinted lens, the gauge features seven solid colors and two cycling modes, allowing you to customize the display to match your dashboard. Additionally, it comes complete with an oxygen sensor and all necessary installation components, ensuring a hassle-free setup. Enjoy peace of mind with a one-year warranty and lifetime technical support from GlowShift.

The ZHSYMX AFR Gauge offers precise and fast readings of your vehicle’s air/fuel ratio, helping you monitor engine performance in real time. Its 52mm size fits easily into most instrument pods, making installation quick and hassle-free. You won’t need to worry about calibration when paired with the compatible wideband sensor, saving you time and effort. This gauge works with many engine management systems and supports vehicle voltages up to 16V, giving you versatile compatibility no matter your setup. The clear digital display provides accurate, broadband measurements to keep you informed at a glance.

The FHRHRY Wideband AFR Gauge is designed to give you clear and accurate air/fuel ratio readings with its digital LED display and color-changing needle, helping you monitor engine performance easily. Its 52mm size fits most instrument pods, allowing flexible installation almost anywhere in your vehicle. This gauge also offers a 0-5V analog output, making it compatible with many engine management systems and data loggers for enhanced control. Equipped with a fast and precise 4.9 LSU sensor, it reacts quickly to even small changes in air/fuel ratio, helping you protect your engine by providing timely data without the need for free-air calibration.